this man who matches the description of the gunman was wheel mood a los angeles hospital. outside terminal 3 paramedics assisted the wounded including this tsa officer who appeared to be unconscious. many passengers described a moment of disbelief when they first heard the shots. people locked themselves in airline offices. they scrambled for cover under airline ticket counters and scott, one couple told us they ran for an exit door on to the tarmac and hid under a plane. >> pelley: carter, thank you very much. so why did this happen? our senior correspondent john miller is with us. he's the former head of counterterrorism for the lapd. john, what have you learned about the suspect? >> he is paul anthony ciancia. as carter said he's from new jersey but a lot doesn't emerge. what you don't see is the criminal record. you don't see other violent acts. what you don't see is references to him in the fbi files. yet what you do see today, according to investigators, is he walks into the terminal. he's got the gun in a garment bag. he takes the rifle out o he opens fire, shoots h